Locking means for adjusting-levers.



E. H. SISCO.

LOCKING MEANS FOR ADJUSTING L EVERS.

APPLICATION FILED DEC. 7. 1912.

1,179,465. Patented Apr. 18, 1916.

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WITNESSES JNV'ENTOR WA/torney THE COLUMBIA PLANOGRAPH 60., WASHINGTON, n. c

ELI/[EB H. sIsco, on WATERVILLE, KANSAS.

LOCKING MEANS FOR ADJ USTING-LEVERS.

Specification of Letters Patent.

. Patented Apr. 18,1916.

Application filed December 7, 1912. Serial No. 735,474.

To all whom it may concern:

Be it known that I, ELMER H. Srsoo a citizen of the United States, residing at Waterville, in the county of Marshall and State of Kansas, have invented new and useful Improvements in Looking Means for Adjusting-Levers, of which the following is a specification.

My invention relates to a locking means for levers or other controlling or adjusting members.

The main object of my invention is to provide means whereby a lever or other adjusting members controlling members such as the ground-engaging members of farm'- ing implements, may be adjusted to a finer degree or extent and locked in such adjusted positions.

Another object of the inventiton is to so construct the means that the rack employed or its equivalent may be built or manufactured as usual in the art, whereby the strength of any of the parts is preserved and not reduced or impaired.

The preferred embodiment of the invention is described hereinafter in connection with drawings accompanying this application; objects minor and more specific than those stated, appearing as the said description progresses.

In the said drawings :Figure 1 is an elevation partly broken .away showing my improvements in connection with a lever or toothed segment. Fig. 2 is a side view of the same parts. Fig. 3 is a transverse sectional view on the line 3-3 of Fig. 1. Fig. 4 is a transverse sectional view on the line 4-4 of Fig. 1, and Fig. 5 is a transverse sectional view on the line 5-5 of Fig. 1.

In the drawings, like reference characters designate like or similar parts throughout the several views.

Referring more specifically to the drawings, 1 designates any suitable support to which is pivoted at 2 a lever 3. Said lever 3 is adapted to be locked in adjusted positions relative to a notched or toothed rack 4 shown fragmentarily and as a segment. This lever 3 may control the extent of penetration or the height of ground-engaging members of farming implements or may be used wherever a lever or adjusting member is required in connection with the control or adjustment of parts.

To the lever 3 is fastened a bracket generally designated 5 as by means of rivets or the like 6. Said bracket is provided with ribs or flanges 7, one at each side adapted to engage the side edges of the lever 3 which serve to position the bracket upon the lever and "prevent lateral movement thereof. In the lower part of the bracket is provided a suitable slot in which slides aplurality of locking members or plungers 8. faces of these plungers may'abut orcontact as shown in they drawings. The plungers each have provided thereon a rod or stem 9 which is more constricted in cross section than is the plunger, thus providing a shoulder at the junction of the plunger with the stem. The bracket adjacent the top thereof is provided with suitable guide openings through which the stems 9 pass. Coil or spiral springs 10 surround the stems 9 and bear against the shoulders at the junction of the same with the plungers and also bear against the bracket at the lower part thereof provided with openings for the stems 9. Opposite the springs, the bracket is preferably cut away or open as at 11. The plungers 8 are at all times pressed by the springs 10 in the direction enabling them to engage the notches of the segment 4. Adjacent the plungers 8 the bracket 5 is provided with a guide or guard flange 12 which extends part way over the segment 4 or the teeth thereof as seen in Fig. 2. The plungers are adapted to be manually controlled or operated in any suitable way and preferably through the medium of a single member. As shown in the drawings, links 13 are pivoted to the stems 9 and are also pivoted to an operating or controlling member 14. This member 14 is adapted to be raised by any suitable means so as to thereby eifect disengagement of plungers 8 with the notches of segment 4 The operatlon is believed tobe apparent, but it will be stated that when it is desired to adjust the members or parts controlled by the lever, the member 14 is raised to thereby effect disengagement with the plungers 8 with the notchesor rack 4. T hereupon, the lever is adjusted and after the desired adjustment has been obtained, the member 14 is released so that the springs 10 will force or press the proper plunger 8 into engagement with the adjacent notch of segment 4.

By providing the plurality of plungers, a

Side

finer degree of adjustment is obtained. With a single plunger, the finest extent of adjustment would be equal to the distance from one notch of the segment 4: to the next notch. By means of my invention an adjustment one-half as fine may be had because one plunger is always in engagement with a notch and the other is resting upon the periphery of an adjacent tooth. Thus when the lever is shifted, the latter plunger will fall into the next notch and the former plunger will rest upon the periphery of the tooth disengaged by the latter plunger. This construction is very advantageous in that a very fine degree of adjustment may be had without sacrificing the strength or durability of the rack or plungers as the teeth of the rack 4 can be made at the proper size and hence it is not necessary to make them small or weak to accommodate the other parts requisite to accomplish the fine degree of adjustment.

Changes falling within the spirit and Copies of this patent may be obtained for five cents each, by addressing the scope of the appended claim are of course,

reserved.

Having thus described my said invention, What I claim as new and desire to secure by Letters Patent, is

In a device of the character described a lever, a rack slidably mounted pawls, resilient means yieldably holding said pawls in a position for engaging said rack, a rod carried by said lever and having its lower end portion formed into an eye, and links connected with the upper ends of said pawls and having their upper ends formed into eyes 'slidably connected with the eye of said rod whereby when said rod is moved longitudinally of said lever, one of said links may be moved to raise its pawl out of engagement with said rack without the other of said pawls being moved by said rod.

ELMER H. SISOO.

Witnesses:

M. E. MCKELVY, W. P. McKELvY.

Commissioner of I'atents,

Washington, D. G. 

